Lasting machine



1929 4 Sheets-Sheet l F. KENNEL LASTING MACHINE F iled March 27.

Dec. 16, 1930.

Jim/enfer` Dec. 16, 1930.

F. KENNEL LASTING MACHINE Filed March 27, 1929 F'ig.2

4 Sheets-Sheet 2 F.KENNEL LASTING MACHINE De'c. 16, L930.

Fled March 27, 1929 4 Sheets-Sheet 3 JnVeni-op Dec. 16, 1930. F. KENNEL LAsTING MACHINE Filed March 27. 1929 4 shuts-sheet 4 Fig. 9

lFlg. 9ctl Jnvenfor 56% fvmb Y lliijtcenfed Dec. 16,1931) 7 1 UNrrEn sraras vrnrrz KENNEL; or wnrssENnELs, o. s.,

GERMANY, Assreivoaro THE FiRM or NoLLEseHE wit-ann KOMM-ens., on wEIssiiNrnLs, o. s., enrtMAN Lesriiva MACHINE Application led March 27, `1929, Serial No. 3595363; and in Germany April 5, 1928.

This invention relates to lasting machines and moreparticularly to the arrangement of means for forming slits in the upper-mate* rial at the toe of the` shoe t'o make the plaits lie smooth upon the insole.

The slitting means shown in the U. S. Patent No.,931,809 have proved very effectivel and advantageous so far as their opera tion is concerned.V They moveV in a broken line to engage, penetrate and slit the upper. This operation gives satisfactory cuts and smooth plaits but the known arrangement has serious drawbacks inasmuch asthe slitting means' are arrangedon a bracket accommodated between the working points of the last'- ing and slitting instrumentalities and the place occupied by the attendant. The attendant is therefore unable to observe the prog-A ress of the work. i

The object of the present invention is to obviate these drawbacks and to arrange the slitting means of the kind described inthe above patent behind the working points of the said instrumentalities so that these points may be easily inspected.` f

A further object is to improve'the opera-V tionsandto simplify machine referred to. n

To this end the two sliding carriers onto which the slitting bars are pivoted are accommodated 1in separate housings and these the construction of the housings are arranged on `eitherside of the' pincers and of the nailing and wiping devices on the machine frame behind the working points of the slitting knives. Preferably these housings are arranged partly orwholly underneath the common wiper.

.These and other features of the invention,

including certain details of construction and arrangements of parts will be hereinafter described and pointed out in the claims. i

The lasting'machine herein shown is fully described in the U. S. Patent No. V534,744 to which reference may be made for details of construction. Y Y

In the accompanying drawings which illustrate a preferred embodiment of the in-- vention, Figi. 1 is a side elevation 4of a part o f the machine; Fig. 2"is a front elevation with the slitting bars broken away'.V Fig. 3 is ahorizontal vcross-section'onth-e line -,g/ o f Fig.. 1; Fig. 4 is a rear elevation; Figs. 5 to 8 illustrate the diferentphases of operationfof a slitting deviceg-and Figs. 9, 9a and v10, 10a illustrate by way. of comparison the slides rare provided with racks 10'.. These racks are engaged by the toothedv segments 9 revolubly mounted upon the pivots 9. y To Vthe samefpivots are fastened thegears 8 which are in mesh with the racks 7 These racks have dogs 6 adaptedto be engaged by thenotches 5of the bar 3. The bar 3 is attached -to the slide 24 by means of the pivot 4. The .slide 24 is connected by the parts 22, 2l and 20?) to. the lever 20a which is oscillated by the cam-,disk 18 keyed to theshaft 17 journalled in the machine frame 23.- By these means an endwise movement is imparted to the bar 3 which canalso be swunglaterally in a horizontal plane about the pivotv4 iIl order to bring the dog 6 of the left or the right notches 5 of the bar 3, As the bars 7 arecon nected by gears to the slides 10 their .to and fro movement is transmitted to the knife V1 or 2 according to the left or rightposition of the bar 3. Arpin l16 of the bar 3'projects into a slot of the member 15 which can be moved by the knee of the attendant to the left orto the right. To this end the member 15 forms a slide movable in the guide 15 and has a pin 14 engaging a slot 14 ofthe vertical slide 13 V likewise movable in the guide" 15. This guide 13 isattached by means kof thearm 35 to the vertical bar 34. .The bar 34 engages by a roller 33 ,into an inclined groove .32 of the knee-lever 31. By swinging of the kneelever 31 theknife 1 or 2 is brought at will into bearingwith the said cam-disk 18. By the same movement of the kneedever the pincers 36 perform their plaiting movement as well known in the art. If no slitting is to'` be performed while the plaiting is going on the lever 20a is brought out of bearing with the said cam-disk. This is obtained by connecting the d levers 20a and 2Gb by spring pressed studs 25. The studs 25 can be disengaged from the lever 20a by means of the wedge shaped ends of the slide 26. The lever 20a. then oscillates while the lever 202) remains at rest. The slide 26 is connected to the lever27 which is kept in the uncoupled position by the spring 37. The lever 27 can be pulled out by hand where it becoines'locked by the pawl 38.

p Fig. 5 shows the left knife in its position of rest on the left side of the wiper 39. In the position illustrated in Fig. 6 theknife/has partially completed its swinging movement toward the work and has just engaged the upper.y IVhile the 'slide is moving from the position shown in Fig. 5 into the position shown in Fig. 6 the cam 30 at the` yend of the knife-lever l2 strikes against the block 28 which thus causes the knife to swing and to come before the wiper 39. `While the slide l0 continues its forward movement the knife makes a drawing slit into the margin of the upper as seen inkFig. 7 The further forward movement of the slide l0 brings the cam 30 of the knife-leverl2 out ofcontact with the block 28 and is swung away from the shoe by the spring 29 so that the knife-holder l2 occupies the position shown in Fig. 8.- The block 28 is a plunger pressed upwardly by a spring. Now the slide l0 returns to the rear and the cam-endv 30 of the knife-lever 12 rides over the inclined upper surface of the block 28 which is thus pushed down against its supporting spring. At the end of its rearwardmovement the block 28 moves again upwardly and assumes its normal position as shown in Fig. 5. The whole path of the knife point is shown by dotted lines in Fig. 8.

Referring now to Figs. 9. and '9aV the pivot 11 of the knife-lever l2 while approachingl the shoe moves from the point a to the point Z2 ina straight line. At the same time the lever l2 swings about the'said pivot a along the circular line a', a. The latterl combines with the path a, b which is equal to the line a, b to the resulting patha, b which is the reali path of the engaging point of the knife. y This resulting path isvertical or almost perpendicular to the slitting direction whichis indicated in Fig. 9a by an arrow. Thus the engaging vpoint of the knifedoes not appreciably change itsfposition in the cutting direction while piercing the upper. Attention now beingdirected to Figs. 10 and la'illustrating the mode of operation'orn the cutting device of the U. S. Patent 931,809 where like Vnumerals indicate like parts as inthe saidV patent it will be observed that the knife-carrier 58 movesalong the line a, b in a reverse direction to the direction of slitting. At the same Vtime this carrier swings about thevpivot a.

The corresponding paths of the engaging point of the knife 66 are a, b and a', a respectively. The resulting path .is designated The knife-carrier 58 `returns along the path b, 0 and continues to swing inwardly. The correspondingpaths ofthe engaging point of Y the knife are b, c and b', b respectively. The resulting path is nf. The point of the fknife engages therefore the upper atb and moves along from b to c in order to pierce the leather. Thus the engaging-point of the knife changes its position in the cutting direction before fully piercing-the upper. (After the piercing the, knife moves in a straight line and slits the marginof the upper. In distinction to the new device which pierces the leather in the vicinity of the first engagement-,that is in the point 'b of Fig. 9a, the known device engages the upper at the point Z2 of the Fig. 10a and pierces it fully atthe point c.Y The Y effect of this difference is that the plaits made with the lasting machine equipped withthe new device begin at the point b" of Fig. 9a of theengagement of the slitting knife while in the machine equipped with the known device the plaits begin at' the point cat the end of the line b', c. This difference is due to the fact that according to the present invention the line a', a of this inward swinging is reversely .directed to the cutting direction while with the known device the direction of the swinging path a, a is ident-ical with the direction ofthe slitting movement. This is a very-important advantage of the new'arrangement while the other advantages residing in the unobstructed viewof the attendant and inthe simplicity of construction accrue from the arrangement of the slitting devices beneath the wiper nearer the machineshaft.

`Vhile'only theoperation of the left knife yis described it is needless to say that the right knife operates in an analogous way. r v. .1'

What I claim is Y l. In a lasting machine Y scribed, lastingpincerslin the front of the machine, two pivoted knife-levers, two slidesV Iof the class de- .sin 100 iio carrying the knife-levers, alwiper, and two irs iso

ings adapted to swing the knife leversuinward and to be pushed out ofthe wayby the returning knife-levers. f f Y 3. InV a' lastingV machine of the class described,-lasting pincers in the front of the machine, two pivoted-knife-levers, two slides carrying the knife-levers, a Vwiper, two housiso ings i''or the slides fastened tothe machineframe on either side of the Wiper behind the pincers, racks on the lowersurfaces of the slides, gears underneath the housings meshing with the racks, and a bar reciprocated in housings or'the slides on either side o and partly underneath the wiper behind the pincers Y 5. In a lasting machine of the class described, lasting pincers in the front of the machine, slitting knives supported behind the pincers, and means for moving said slitting knives along broken paths.

6. ln a lasting machine of the class. described, lasting pincers in the front of the machine, slitting knives behind the pincers, and means for causing said knives toapproach the work by a swinging `movement while simultaneously moving in the slitting direction.

7. In a lasting machine of the class described, lasting pincers in the front of the machine, slitting knives behind the pincers, and means for causingsaid knives to pierce the leather by moving in the slitting direction while simultaneously swinging toward the work.

In testimony whereof I aiiiX my signature.

FRITZ KENNEL. 

